Service Manual

Fuel System ISB, ISBe and QSB (Common Rail [...]
Page V-98 Section V - Specifications
To buy Cummins Parts and Service Manuals, Training Guides, or Tools go to our website at https://store.cummins.com
Fuel System
Specifications
Automotive and Industrial
For performance and fuel rate values, refer to the Engine Data Sheet.
Maximum Fuel Inlet Restriction
With gear pump only (no engine mounted electric fuel lift pump) (at gear pump inlet)..................50.7 kPa [15 in-Hg]
With engine mounted electric fuel lift pump (at electric fuel lift pump inlet)......................................20.3 kPa [6 in-Hg]
Rail Pressure
3.9 liters [238 C.I.D.] and 5.9 liter [360 C.I.D.] Engines Without EGR.................250 to 1400 bar [3626 to 20,305 psi]
5.9 liters [360 C.I.D.] Engines With EGR.............................................................250 to 1600 bar [3626 to 23,206 psi]
4.5 liters [275 C.I.D], and 6.7 liters [409 C.I.D.] Engines without EGR................250 to 1600 bar [3626 to 23,206 psi]
Fuel Pressure Range at Fuel Filter Outlet (engine cranking)
With gear pump only (no electric lift pump).................................................................303 to 1103 kPa [44 to 160 psi]
With electric lift pump......................................................................................................0.0 to 0.8 bar [0.0 to 11.6 psi]
Fuel Pressure Range at Fuel Filter Inlet (engine running)
With gear pump only (no electric lift pump).................................................................503 to 1303 kPa [73 to 189 psi]
With electric lift pump............................................................................................................0 to 80 kPa [0 to 11.6 psi]
Maximum Pressure Drop across Fuel Filter
With gear pump only (no electric lift pump).........................................................................................200 kPa [29 psi]
With electric lift pump...............................................................................................................................34 kPa [5 psi]
Maximum Fuel Drain Line Restriction........................................................................................................20 kPa [2.9 psi]
Maximum Fuel Inlet Temperature..................................................................................................................70°C [158°F]
Marine Applications
For performance and fuel rate values, refer to the Engine Data Sheet.
Engine Idle Speed..................................................................................................................................Minimum 600 rpm
Maximum Fuel Inlet Restriction (to lift pump)............................................................................................14 kPa [4 in-Hg]
Rail Pressure.............................................................................................................250 to 1440 bar [3626 to 20,885 psi]
Fuel Pressure Range at Fuel Filter Outlet (engine cranking)..................................................0 to 79.9 kPa [0 to 11.6 psi]
Fuel Pressure Range at Fuel Filter Inlet (engine running)................................................0.0 to 79.9 kPa [0.0 to 11.6 psi]
Maximum Pressure Drop across Fuel Filter..................................................................................................34 kPa [5 psi]
Maximum Fuel Drain Line Restriction...........................................................................................................34 kPa [5 psi]
Maximum Fuel Inlet Temperature..................................................................................................................60°C [140°F]
Minimum Engine Cranking Speed.........................................................................................................................150 rpm
Primary Off engine fuel filter element..................................................................................................................10 Micron
Secondary On engine fuel filter element...............................................................................................................3 Micron